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  3. New research shows that children born after unplanned pregnancies develop more slowly than children whose parents had planned th

New research shows that children born after unplanned pregnancies develop more slowly than children whose parents had planned th

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问题     New research shows that children born after unplanned pregnancies develop more slowly than children whose parents had planned their pregnancy. However, once the results are adjusted to take into【C1】______socioeconomic【C2】______, these differences disappear.
    A team from the University of Oxford used data from the Millennium Cohort Study to【C3】______the effect of pregnancy planning on childhood development. The Millennium Cohort Study collected【C4】______from parents of children born between 2000 and 2001 in the U. K. when the children were 9 months old, and then revisited them at age 3, 5 and 7.
    The researchers, led by Claire Carson of the National Perinatal Epidemiology Unit at the university, found that children whose parents had not planned to have a baby had worse verbal and non-verbal skills, and spatial【C5】______, than their planned counterparts,【C6】______behind by around five months at age 5.
    The team also looked at the development of children born as a result of IVF treatment and found that they were three to four months ahead in terms of their development than children who had been planned. These differences didn’t【C7】______disappear when the results were adjusted for the family’s【C8】______but it follows that more privileged families are more likely to be able to afford expensive IVF treatment.
    Other advantages associated with a【C9】______socioeconomic position include more highly educated parents and more parental involvement. " At the other end of the spectrum, " the authors write, " children born after mistimed or unplanned pregnancies might have【C10】______to fewer educational resources, such as books, puzzles, trips to library. "
A)access B)account C)awareness D)beneficial
E)benevolent F)circumstances G)data H)distinguish
I)factors J)investigate K)involving L)lagging
M)surveyed N)totally O)unexpectedly
【C6】
选项
答案L
解析 空格前为完整的语句，故该空格所在部分为非谓语部分，空格后为副词behind。lag behind意为“落后、拖欠”。所以空格处应填入L)lagging。
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大学英语四级

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